Turning on LED with BT HC-06

hc06-LED-control.ino

/* Code Next Arduino Robotics club
*  Turn on LED via BT example
* Pair a device via Bluetooth to HC-06
*  Use a Bluetooth Terminal app to send characters
*/


#include <SoftwareSerial.h>
SoftwareSerial BTserial(10, 11); // RX | TX
// Connect the HC-06 TX to the Arduino RX on pin 10. 
// Connect the HC-06 RX to the Arduino TX on pin 11

 
 int led = 13; 

void setup() 
{
    Serial.begin(9600);
 
    // HC-06 default serial speed is 9600
    BTserial.begin(9600);  
    pinMode(led, OUTPUT); 
    digitalWrite(led, HIGH);
}
 
void loop()
{
 
    // Keep reading from HC-06 and send to Arduino Serial Monitor 
    while (BTserial.available()>0)
    {  
       //this code runs if connecting via BT on another device
        //Serial.write(BTserial.read());
        char c = BTserial.read();
       
        if (c == 'a'){
          digitalWrite(led, HIGH);
          //delay(1000);
        } else if (c == 'b'){

          digitalWrite(led, LOW);
        }else {
          Serial.println("Enter a or b");

        }
      delay(10);
        
    }
 
    // Keep reading from Arduino Serial Monitor and send to HC-06
    while (Serial.available()>0)
    {
       //This runs while the communication is coming from the Serial USB
        BTserial.write(Serial.read());
    }

 delay(10);
}